Ear plug



FIG. 1 is a perspective view taken from the smaller end of the ear plug towards the enlarged outer end, and showing my new design;

FIG. 2 is a side elevational view;

FIG. 3 is an end elevational view taken from the smaller end; and

FIG. 4 is an end elevational view taken from the larger end. 

The ornamental design for an ear plug, substantially as shown and described. 